Science: Detective Hrdlicka

Almost every year for twelve years Dr. Ales Hrdlicka, famed Bohemian-born anthropologist of the Smithsonian Institution, has conducted expeditions to Alaska and the Aleutian Islands to find traces of prehistoric migrations from Asia, has brought back carloads of material from hundreds of village sites. Far from digging at random in the hope of uncovering such a site, when he enters new terrain Dr. Hrdlicka can now spot one as far away as he can see. What makes this scientific detective work possible he last week explained in Science.

The accumulated deposits of a...

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